Although physical activity is recommended for weight loss, outcomes from increased physical activity have been heterogeneously distributed—not all overweight participants lose weight and some even gain weight. Furthermore the etiologies of overweight/obesity and T1D appear to interact, yet no study has tested the influence of physical activity upon biological pathways related to overweight/obesity for patients with T1D. Accordingly, our secondary aim is to evaluate changes in adipocytokines and epigenetic factors related to the etiology of overweight/obesity following our physical activity intervention. We hypothesize changes in these biomarkers will correlate with changes in anthropometry variables and partially explain any differences in response between the groups and individuals should those occur.